Grade 7 - Mathematics10.6 Bar Diagram (Vertical)

Important points while drawing the bar diagram:
1. Each bar represents only one value of the data and hence there are as many bars as there are values in the data.
2. The height of the bar indicates the value of the item.
3. The width of the bar does not indicate any thing.
4. The gap between one bar and another is taken uniformly.
5. All bars should rest on the same line called the base.
6. The bars may be draw horizontally or vertically.

Example:
The number of words in a paragraph with different number of letters are given below represent the data by the diagram

No. of letters in a word

1

2

3

4

5

6

7

8

above 8

No. of words in a para

15

75

80

45

70

65

90

25

35

Solution:
1. Take a graph paper and draw two perpendicular lines one horizontal and other vertical.

2. Along the horizontal line mark "numbers of letters occurring in a word" and along the vertical line "number of words occurring in the paragraph".
Choose (a) width of each bar = 1cm.
(b) Gap between bars = 1cm.